Subtract 15/4 from 42/70
1st number: 42/70, 2nd number: 3 3/4
42/70 - 15/4 is -63/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 4 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
42/70 = 42 × 2/70 × 2 = 84/140 - Likewise, for the 2nd fraction, since 4 × 35 = 140,
15/4 = 15 × 35/4 × 35 = 525/140 - Subtract the two like fractions:
84/140 - 525/140 = 84 - 525/140 = -441/140 - After reducing the fraction, the answer is -63/20
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